Research on Single Carrier Underwater Acoustic Communication Based on Multiband Transmission

doi:10.3969/j.issn.1000-1093.2016.09.018

Abstract

Abstract: For the high peak-to-average power ratio and the sensitivity of orthogonal frequency division multiplexing system to Doppler shift, a single carrier underwater acoustic (UWA) communication method based on multiband transmission is proposed, providing a feasible approach for high-rate UWA communication. The communication band is divided into some sub-bands with several kilohertz in bandwidth, and a guard band is inserted between sub-bands to eliminate inter-carrier interference at the receiver. A UWA communication experiment was conducted at sea. The available band is divided into two sub-bands, of which has 2.25 kHz in bandwidth and a 0.75 kHz guard band, and the carrier frequencies are 3 kHz and 6 kHz, respectively. Passive time reversal mirror combined with decision feedback equalizer is used to suppress inter-symbol interference. Transmissions of test data at communication distances of 3 km, 5 km, and 7 km are implemented at low bit error rate with communication rate of 9 kbit/s when modulated by 8-PSK, proving the effectiveness and robustness of the proposed method.

Key words: communication technology, high-rate UWA communication, single carrier, multiband transmissions, passive time reversal mirror, decision feedback equalizer

CLC Number:

TN929.3

HAN Xiao, GUO Long-xiang, YIN Jing-wei, SHENG Xue-li. Research on Single Carrier Underwater Acoustic Communication Based on Multiband Transmission[J]. Acta Armamentarii, 2016, 37(9): 1677-1683.

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